Can end coating nozzle



Jan. 2, 1962 T. MILLER ET AL 3,015,302

CAN END COATING NOZZLE Original Filed Sept. 9, 1957 I f1, INVENTORS PJ TMZZZeT,

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'with the outer edge of said seaming United States Patent 3,615,302 CAN END COATING NOZZLE Teddy Miller, John H. Anderson, and David J. Rosbe, Chicago, 111., assignors to Continental Can Company, Inc, New Yor N.Y., a corporation of New York Original application Sept. 9, 1957, Ser. No. 682,755. Divided and this application May 6, 1959, Ser. No.

6 Claims. (Cl. 118-318) This application is a division of our parent U.S. application, Serial No. 682,755, filed September 9, 1957, and relates to the nozzle construction disclosed by our said parent application.

Metal can ends for double-seaming onto flanged can bodies, are each customarily provided with a channel formation which receives the body flange when the end is dropped onto the body in readiness for seaming. Each channel formation comprises a seaming panel, a curl integral with the outer edge of said seaming panel, a chuck wall at the inner edge of said seaming panel, and a seaming panel radius integrally connecting said chuck wall and said seaming panel.

Prior to dropping the can ends onto the can bodies in readiness for seaming, it is customary to run said ends through a coating machine which coats the channel formation of each end with a plastic sealing compound to not only prevent leakage in the completed seam but to cushion the seaming operation and avoid breaking of any enamel or lacquer coatings which may be employed. In the application of such cushion seals to the can ends it is customary to coat the entire width of the seaming panel, the curl, the seaming panel radius md about half of the height of the chuck wall.

Experience and extensive experimentation have shown that such conventional coating makes it difficult to form a perfect double seam because of the existing excess of sealing compound. Moreover, in the completed seam, the excess compound tends to cause a void within the body hook radius and it also tends to cause shortened hooks in the seam. Then, too, it frequently causes cans,

of abnormal height which sometimes bind in runways and conveyors.

The present invention has aimed to overcome these difiiculties and at the same time to reduce the consumption of sealing compound by providing a novel nozzle for applying this compound to certain restricted areas of the channel formations of the can ends.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claims and the several views illustrated in the accompanying drawing.

In the drawing:

FIGURE 1 of the accompanying drawing is a tragmentary side elevation showing the nozzle applied to coacting portions of a can end coating machine.

FIGURE 2 is an enlarged side FIGURE 3 is a lower end view of the nozzle.

FIGURE 4 is a vertical sectional view as indicated by the lines 4--4 of FIGURES 2 and 3.

FIGURE 5 is a further enlarged detail sectional view looking in the opposite direction from FIGURE 4, showing the nozzle tip operatively related with the channel formation of a can end and disclosing the two separate coatings applied to said channel formation.

In FIGURE -5,of the drawing, a can end E is shown having a conventional channel portion. This channel portion comprises a seaming panel P, a curl C integral panel P, a chuck wall W at the inner edge of said seaming panel P, a seaming panel radius R integrally connecting the lower end of said elevation of the nozzle.

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chuck wall W with said seaming panel P, and a chuck wall radius R integrally joining the upper end of said chuck wall W with the disk portion of the end E.

By means of the present invention, one coating 10 is applied to the curl C and to part of the width of the seaming panel P: and a second coating 11 is applied to the chuck wall W and to the contiguous portion of the seaming panel radius R.

It is preferable that the one coating 10 be applied to partly cover the curl C and the outer half of the width of the seaming panel P. It is also preferable that the second coating 11 be applied to cover the chuck wall W and the upper half of the seaming panel radius R. It is also preferable that the coating 11 be applied slightly thicker than the coating 10. For both coatings, any suitable sealing compound, such as those commonly used, may be employed.

The nozzle 12 shown in the drawing is well adapted for simultaneously applying the two distinct coatings 10 and 11, when used as an element of a conventional can end coating machine. Portions of such a machine are shown in FIGURE 1. In this view, a valve casing 13 is carried by a bracket 14- and receives fluid coating compound from a conduit 15. The nozzle 12 is coupled by a ring nut 16 to the lower end of the valve casing 13: and a conventionally operated needle valve 17 starts and stops discharge of the fluid compound from the nozzle, to apply the coatings 10 and 11 as the can ends are presented and rotated, as usual.

The nozzle 12 comprises a body 18 which is downwardly tapered to a tip 19. The upper end portion 20 of this body is cylindrical and is flanged at 21 for engagement by the ring nut 16. The portion 20 also has two flats 22 for engagement by a wrench to prevent the nozzle from turning with the ring nut during nozzle attachment.

A substantially conical recess 23 is formed in the body and opens through the upper end of said body to receive the fluid sealing compound from the valve casing 13: and the lower end portion 24 of said recess forms a seat for the needle valve 17.

The tip 19 is formed with two downwardly converging end surfaces 25 and 26. The one end surface 25 is preferably disposed at an angle of 45 to the axis AA of the body 18: and the second end surface 26 is preferably at an angle of to said axis, as shown in FIGURE 4.

The tip is formed With two opposed, downwardly diverging, discharge openings 27 and 28 from its interior to its exterior. The axis of the one opening 27 is preferably at 60 to the body axis AA: and the axis of the second opening 28 is preferably at 30 to said axis A-A, as shown in FIGURE 4. The one opening 27 preferably opens partly through the one end surface 25: and the second opening 28 preferably opens partly through the second end surface 26. Over the opening 28, a portion of the tip 19 is cut away at 29 for additional clearance with the edge of the curl C.

When the nozzle 12 is attached to the valve casing 13, its axis AA is at about 15 to the vertical and the end surfaces 25 and 26 will therefore be at about 60 and 0 respectively to the seaming panel P of each of the suc cessively presented can ends. The opening 28 is then properly directed to, with the aid of centrifugal force,

different thicknesses to the two coatings 1t and 11, for

best results.

From the foregoing, it will be seen that novel and advantageous provision has been made for attaining the desired results. However, attentionis invited to the posto said seaming panel, said nozzle comprising a hollow body to receive the compound, said body being downwardly tapered to a tip receivable between said curl and said chuckwall, said tip having two downwardly converging flat end surfaces, a first of said end surfaces being disposed at substantially 45 to the axis of said tapered body, the second of said end surfaces being disposed at substantially 75 to said axis, said tip having two opposed downwardly diverging compound discharge openings, the axis of one of said openings being disposed at substantially 60 to said axis of said tapered body and opening at least partially through said first end surfaces, the axis of the second of said openings being disposed at substantially 30 to said axis of said tapered body and opening at least partially through said second end surface, said one of said openings being adapted to discharge compound onto at least part of said curl and onto part of the width of said seaming panel, said second of said openings being adapted to discharge compound onto said chuck wall and onto a contiguous portion of said seaming panel radius.

2. A structure as specified in claim 1: said second of said openings being of slightly greater diameter than said one of said openings to deposit a slightly thicker layer of compound onto said chuck wall and contiguous portion of said seaming panel radius.

' 3. A compound applying nozzle for applying sealing compounds to a rotating can end in two separated lines with the nozzle being centered between said two lines, said nozzle comprising a hollow body to receive the compound, said body being generally conical in outline and being downwardly tapered to a tip having two downwardly converging fiat surfaces meeting along a line disposed generally tangential to the path of the rotating can end disposed therebelow to provide clearance for compound being applied, said tip having a downwardly disposed compound discharge opening extending'entirely through said body and opening at least partially through each of said flat surfaces remote from said meeting line.

4. The compound applying nozzle'of claim 3 wherein one of said openings has a greater cross-sectional area than the other and thus a greater capacity to deposit a thicker layer of compound than the other opening.

' 5. A compound applying nozzle for simultaneously can end, said nozzle comprising a hollow body to receive the compound, said body being downwardly tapered to a tip, and said tip having two oppositely directed downwardly directed compound dispensing bores opening therethrough, the one of said bores for delivering compound to form the inner compound ring being of a greater diameter than the other of said bores, whereby the inner compound ring will be of a greater thickness than the outer compound ring.

' 6. A nozzle for applying a fluid sealing compound to a rotating can end of the type having a seaming panel, a curl integral with the outer edge of said seaming panel, a chuck wall at the inner edge of said seaming panel, and a seaming panel radius integrally joining said chuck wall to said seaming panel, said nozzle comprising a hollow body to receive the compound, said body being downwardly tapered to a tip receivable between said curl and said chuck wall, said hollow body having an internal coniapplying inner and outer rings of compound on a rotating cal recess, said tip having two downwardly converging flat end surfaces, a first of said end surfaces being disposed at substantially 45 to the axis of said tapered body, the second of said end surfaces being disposed at substantially 75 to said axis, said flat end surfaces intersecting in a line disposed at right angles to the axis of said hollow body and generally-tangential to a path of a rotating can end disposed therebelow, said tip having two opposed downwardly diverging compound discharge openings extending entirely through said hollow body and opening into said conical recess, the axis of one of said openings being disposed at substantially to said axis of said tapered body and opening at least partially through said first end surface, the axis of the second of said openings being disposed at substantially 30 to said axis of said tapered body and opening at least partially'through said second end surface, said'one of said openings being adapted to'discharge compound onto at least part of said curl and onto part of the width of said seaming panel, said second of said openings-being adapted to discharge compound onto said chuck wall and onto a contiguous portion of said seaming panel radius, said second opening being of a slightly greater diameter than said first opening to deposit a slightly thicker layer of compound onto the chuck wall and onto a contiguous portion of the seam panel radius.

References Cited'in the file of this patent UNITED STATES PATENTS 2,047,691 Konquest 'July 14, 1936 2,287,356 Newman June 23, 1942 2,520,175 Socke 'Aug. 29, 1950 2,699,358 Sonderegger Jan. 11, 1955 

